Suspension-insulator



M. CAROLUS:

SUSPENSION INSULATOR.

APPucAr-lou FILED SEPT. 29 1921.

1 198,937 Patented Nov. 29, 1921.

Live/ZZZ UNITED STATES PATENT OFFICE.

KAX CAROLUS, F 'I'ELTOW, NEAR BERLIN, GERMANY.

SUSPENSION-INSULATOR.

1,398,937 Specification of Letters Patent. Patentd N 29, 1921, Application filed September 29, 1921. Serial No. 504,243.

To all whomz'zf may concern: In comparison with known types of ce- 'ments in Suspension-Insulators, of which pose of fixing the bolt,

ing body, which is closed at the top, is debrush dis har e 'in t an insulating body 3 having a closed head th h t it collar 6; and a collar 7 of yielding mate then put into a pulling device of a special th i l h d f Be 1t known that I, MAX CARoLUs, residmentless suspension insulators ing at Teltow, bei Berlin, Germany, have innumber of individual vented certain new and useful Improveserted into the insulati in which a ng dy for the pa the following is a specification. addition to its simplicityand reliability in Thls invention relates to suspension insuuse, oliers the advantage that the distribulators in which no separation of the suspention of the electric field through the closed sion members takes place when the insulatmetal ring is more uniform and non-uniform he interior of the insuso likely to occur. Be-

al ring affords a much I y against breakage than is stroyed, so that the line held by the insulalating body ar not tor is prevented from dropping. side the closed met he invention is illustrated in the drawgreater urit ing in whichattained in the known type of suspension lgure 1 1s a section through a finishe insulators. insulator. I claim Fig. 2 illustrates the elements of the sus- 1, I a Suspension i l t an insulating Pension member, and body with a head formed with a cavity 3 Shows the elements Of the SuSpentherein a supporting ledge cavity a S1011 111611119811 assembled bolt, a conical head on said bolt, a malleable As Shown 1n 1 the lnsulato? comprles metal ring adapted to be slipped over said a supportmg p 1 of kIlPWn i; an bolt and to be expanded by the conical head Serted ring 2 made of yleldlng'materlal, and and pressed against said supporting ledge s periphery so as to prevent 30 said conical head from leaving said cavity, said ring being contracted at its lower edge to engage said bolt, said ring being provided with a circumferentially weakened area adjacent said contracted end, whereby during 35 expansion said ring will bend at its predetermined line of weakness. rial. I 2. In a suspension insulator an insulat- The Parts 6 and 7 are assembled 1n ing body with a head provided with a cavity the manner Shown in 3 then P h therein; a supporting ledge in the said cavthrough the neck of the insulating body into i b lt; a conical h d on th 1 115; a

its interlol' Cavity, the Ting 7 of y g metal ring adapted to be slipped over the telial being pp Onto the C10ed metal bolt and to beexpanded by the conical head collar 6 y the application Of a g P and pressed throughout its periphery against sure. The parts inserted in this way are th id u orting ledge so as to prevent in leaving the said cavnsiderably greater than ed by the insulator is aplt; and a washer of yield with a cavity that flares inward.

The elements of the suspension members are a suspension bolt 4 with a knob at one end and a screw thread at the other; a truncated cone 5 adapted to be screwed, riveted or welded. onto the said bolt; a closed metal kind and subjecte to a pull several times it h a ll C0 greater than its service load, for example a th l d t b Carri pull of about 6000 kilograms. The pull apli d t th id b plied to ,the knob of the bolt 4 and acting ing mateiral forced upon said metal ring 1 tllIOLlgll the 00116 5 on the closed COllElI 6 and adapted to be tensioned aid ring and the ring 7 encircling it, has the effect of h id i i and d,

expanding or widening the collar 6 and ring 3 I a Suspension i l t an i l t 7 in such a manner that the bolt 4. together ing body with a hollow head and a neck with the conical head 5 and the collar 6 and smaller in diameter than the head; a supring 7 cannot be withdrawn from the cavity porting cap enveloping the said head and in the head of the insulator. The ring 7 of having a constricted annular edge engaging yielding material forms a washer between with the said neck; an annular supporting the metal collar 6 and the annular ledge in ledge within the hollowof the said head;

- the cavity of the insulating body and this and a link comprising a bolt formed with a a A washer distributes the mechanical stress knob at one end and having a flaring head at evenly over the said annular ledge. its other end that tapers inwardly in the direction toward the said knob; the saidfiar ing head consisting of a conical member, a malleable metal ring adapted to be expanded by the conical memberand pressed against Y the said annular supporting ledge when a tor, and a washer of yielding material forced upon said metal ring and'adapted to be specification in the presence stretched around said ring when said ring is expanded, said ring and washer engaging said ledge throughout their entire periphery.

In testimony whereof I have signed this 15 of two Witnesses.

MAX CAROLUS.

- YVitnesses:

MAX SCHULTE, v ADOLF DAULMADT. 

